Honeycomb filter
a filter and honeycomb technology, applied in the field of honeycomb filters, can solve the problems of affecting the environment and human body by pm
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first embodiment
[0252]A honeycomb filter according to a first embodiment of the present invention is described below.
[0253]The honeycomb filter according to the first embodiment of the present invention includes a plurality of honeycomb fired bodies each having an outer wall on the periphery thereof. Each honeycomb fired body includes exhaust gas emission cells each having an open end at an exhaust gas outlet side and a plugged end at an exhaust gas inlet side, and exhaust gas introduction cells each having an open end at the exhaust gas inlet side and a plugged end at the exhaust gas outlet side, the exhaust gas introduction cells including first exhaust gas introduction cells and second exhaust gas introduction cells. The honeycomb fired bodies are combined with one another via adhesive layers therebetween.
[0254]The exhaust gas emission cells are each adjacently surrounded fully by the first exhaust gas introduction cells and the second exhaust gas introduction cells across the porous cell walls....
example 1
[0357]A mixture was obtained by mixing 52.8% by weight of silicon carbide coarse powder having an average particle size of 22 μm and 22.6% by weight of silicon carbide fine powder having an average particle size of 0.5 μm. To the resulting mixture were added 4.6% by weight of an organic binder (methylcellulose), 0.8% by weight of a lubricant (UNILUB, manufactured by NOF Corporation), 1.3% by weight of glycerin, 1.9% by weight of a pore-forming agent (acrylic resin), 2.8% by weight of oleic acid, and 13.2% by weight of water, followed by kneading to prepare a wet mixture. Subsequently, the wet mixture was extrusion-molded (molding step).
[0358]In this step, a raw honeycomb molded body having the same shape as the honeycomb fired body 10a shown in FIG. 8A but without plugs in the cells was manufactured.
[0359]Next, the raw honeycomb molded body was dried by a microwave dryer to manufacture a dried honeycomb molded body. Then, predetermined cells of the dried honeycomb molded body were p...
second embodiment
[0399]A honeycomb filter according to the second embodiment of the present invention is described below.
[0400]The honeycomb filter according to the second embodiment includes one honeycomb fired body having an outer wall on the periphery thereof. The honeycomb fired body includes exhaust gas emission cells each having an open end at an exhaust gas outlet side and a plugged end at an exhaust gas inlet side, and exhaust gas introduction cells each having an open end at the exhaust gas inlet side and a plugged end at the exhaust gas outlet side, the exhaust gas introduction cells including first exhaust gas introduction cells and second exhaust gas introduction cells.
[0401]The exhaust gas emission cells are each adjacently surrounded fully by the first exhaust gas introduction cells and the second exhaust gas introduction cells across the porous cell walls.
[0402]In the cross section perpendicular to the longitudinal direction of the cells, each second exhaust gas introduction cell has ...
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Abstract
Description
Claims
Application Information
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